At the higher end of you budget I suggest making a personal shopping appointment at Bloomingdale’s. It’s free and there’s no obligation. I did it when I had a wedding with some odd requirements a few years ago. They ended up helping me get a dress that retailed for $300, but informed me of a sale and convinced me to sign up for a credit card, which brought it down to $180. I paid the credit card off immediately and never used it again. It’s now my go to wedding dress.